USMC Confirms Plans to Adopt the Next Generation Squad Weapon

Matthew Moss
by Matthew Moss
Sgt. Margarita B. Valenzuela, automatic rifleman with 2nd Platoon, Company A, Ground Combat Element Integrated Task Force, engages known-distance targets with the M27 Infantry Automatic Rifle from the standing position during a three-day field exercise Camp Lejeune, North Carolina, (USMC/Sgt. Alicia R. Leaders)

The US Marine Corps has recently undergone a top down doctrinal reevaluation of its future role. As part of these changes in the make up of the Corps have been planned and now a brand new initiative has also been launched – Marine Corps Systems Command’s Program Manager for Infantry Weapons has begun a large-scale modernisation program to increase the lethality of the Marine infantry squad.

The efforts are part of Commandant of the Marine Corps Gen. David Berger’s vision to redesign the Corps to meet future challenges. Lt. Col. Tim Hough, MCSC’s program manager for Infantry Weapons, called it “the largest modernization of the infantry squad in the last 25 years.”

U.S. Marines with 3rd Battalion 8th Marine Regiment fire the M27 Infantry Automatic Rifle during a live-fire weapons exercise at Camp Lejeune, N.C., 2017 (USMC/L.Cpl. Michaela R. Gregory)

This modernisation project will not only see the USMC become a corp part of the US Army’s Next Generation Squad Weapon Program but it will also see the completion of the general adoption of the M27 IAR as the Corps’ standard issue rifle and the procurement of a series of accessories, optics and communications kit that will enhance the lethality of Marine infantry.

The USMC has previously signalled their involvement in the NGSW program but this is the first confirmation that if the program is successful, the 6.8mm NGSW-R will likely be the weapon which replaces the M27. Maj. Mike Brisker, weapons product manager for PM IW said that the Marine Corps could receive the first deliveries of the NGSW as early as the fiscal year 2025. To put that into perspective, the US Army expects to procure its first batch of weapons in 2021, with a total of over 90,000 rifles delivered by 2024, and a further 54,000 delivered in FY2025. We broke down the projected numbers from the US Army’s projected 2021 budget here.

Marine Corps officials told TFB that:

Marine Corps is participating in and providing significant support to the Army’s development of Next Generation Squad Weapons (NGSW), to include Soldier Touchpoint. We collaborate on many efforts with the Army to ensure we take advantage of both services’ research and development efforts to field the best capabilities to our warfighters.

SIG’s MG-6.8 (Matthew Moss/TFB)
Textron’s NGSW-AR (Textron)

What is currently unclear is how this move will impact the USMC squad loadout doctrine with the M249 belt-fed light machine gun replaced by the M27. The selection of the NGSW-Automatic Rifle from either SIG Sauer or Textron would see the Corps move back to a belt-fed weapon. In contrast the box magazine fed rifle and automatic rifle from General Dynamics would see a continuation of the Marine Corps magazine fed doctrine.

If one of the belt-feds entries are selected, however, this would mark a shift back to suppression through volume of fire rather than precision. Of course, it may be that the USMC choose to simply adopt the NGSW-R to replace the M27.

The magazine-fed NGSW-R & NGSW-AR entry from General Dynamics (GD-OTS)

We asked the USMC whether they would shift back to a belt-fed if the Army selects one of the belt-fed NGSW-AR options. Marine Corps officials explained that they:

…will continue to participate in and assess NGSW solutions for maturity, suitability and affordability to meet our operational requirements in order to inform a decision on if and when to begin procurement of these improved capabilities.

U.S. Marines with the Aviation Combat Element, Marine Rotational Force - Darwin, conduct practical application to compare green and white phosphor night vision goggles at RAAF Base Darwin, Australia, June, 2019. (USMC photo by Lance Cpl. Kealii De Los Santos)

Marine Corps Systems Command’s Program Manager for Infantry Weapons will also oversee the roll out of the new Squad Common Optic, from Trijicon, and the helmet-mounted Squad Binocular Night Vision Goggle. PM IW and Fleet Marines are participating in the Army’s Integrated Visual Augmentation System, which our sister site Overt Defense has covered here. The new Enhanced Night Vision-Binocular program is also underway.

“…We’re looking to lighten the load and increase the overall lethality of Close Combat Forces—specifically infantry Marines. These efforts show we are focused on staying abreast of advancements that are coming quickly.” said CW4 David Tomlinson, an infantry weapons officer with PM IW.

Matthew Moss
Matthew Moss

Managing Editor: & Overt Matt is a British historian specialising in small arms development and military history. He has written several books and for a variety of publications in both the US and UK. Matt is also runs The Armourer's Bench, a video series on historically significant small arms. Here on TFB he covers product and current military small arms news. Reach Matt at:

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  • Spandexboy Spandexboy on May 24, 2020

    I'd like to see the GD RM277 NGSW(R/AR) replace the M4/M16/M249 and the Sig MG-.338 replace the M240, but with the latter also using a .338 True Velocity Composite Munition based cartridge. The TVCM design is a significantly bigger improvwmw
    over the Sig amunition, because it appears to be very close in the weight savings toTextron's Cased Telescoped Ammunition, but without the drawacks of the CTA and CTA firearms's operating system. The TVCM while requiring significant changes for factory ammunition producers is not as major a change as the CTA.

  • Ondej Tma Ondej Tma on May 24, 2020

    Do I get this history right?

    1) Marines bought M27 as a replacement for machineguns, because "MGs should look like ARs".
    2) Marines said that since they already have M27s as MGs, they could as well go and buy more M27 as ARs.
    3) Marines said that actually, MG doesn't need to look like an AR, and M27 is bad MG anyway, so they need to buy another MG replacement for the M27 MGs.

    • Uniform223 Uniform223 on May 24, 2020

      @Ondřej Tůma A little more nuanced than that but pretty much.